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Diagrams: Powdery Mildew Fungi: Classification and Ecology

Key to Genera of Powdery Mildew Fungi

Appendages coiled or hooked at tip --- Uncinula
Appendages simple and straight with bulb-like base --- Phyllactinia
Appendages branching dichotomously at tip
    Cleistothecium contains a single ascus --- Podosphaera
    Cleistothecium contains several asci --- Microsphaera
Appendages simple or irregularly branched, often entwined
    Cleistothecium contains a single ascus --- Sphaerotheca
    Cleistothecium contains several asci --- Erysiphe


Illustrated Key to Genera of Powdery Mildew Fungi

Generalized Life Cycle of Powdery Mildews

Powdery Mildew Data Recording Sheet